Inorganic Solid Phases

[Sr0.9K0.8Na0.4Ca0.4Ba0.3][Sr0.4(H2O)0.8][Ti5.6Nb2.4(OH,O)8(Si4O12)4]·8.3H2O (K0.4Na0.2Ba0.15Sr0.65Ca0.2Ti2.8Nb1.2Si8O23.8[OH]4.2[H2O]4.55) Crystal Structure

General Information

  • Phase Label(s): K0.4Na0.2Ba0.15Sr0.65Ca0.2Ti2.8Nb1.2Si8O23.8[OH]4.2[H2O]4.55
  • Structure Class(es):
  • Classification by Properties:
  • Mineral Name(s): tsepinite-Sr
  • Pearson Symbol: mS128
  • Space Group: 8
  • Phase Prototype: K0.4Na0.2Ba0.15Sr0.65Ca0.2Ti2.8Nb1.2Si8O23.8[OH]4.2[H2O]4.55
  • Measurement Detail(s): automatic diffractometer (determination of cell parameters), automatic diffractometer; Enraf-Nonius (determination of structural parameters), X-rays, Mo Kα; λ = 0.071073 nm (determination of cell and structural parameters)
  • Phase Class(es):
  • Compound Class(es): hydroxide, silicate, hydrate
  • Interpretation Detail(s): positions of non-H atoms determined, least-squares refinement; 1182 reflections; F > 3σ(F), R = 0.066
  • Sample Detail(s): tsepinite sample from Russia, Kola Peninsula, Khibiny massif, Mt. Eveslogchorr, electron microprobe analysis; Sr0.48−0.57K0.27−0.40Ca0.14−0.28Na0.14−0.25Ba0.06−0.44Mn0−0.02Fe0−0.01(Ti2.47−2.84Nb1.2−1.57)[Si4O12]2[H2O]n, n= 6-8, single crystal (determination of cell parameters), single crystal, 0.10×0.15×0.4 mm3 (determination of structural parameters)

Substance Summary

  • Standard Formula: K0.4Na0.2Ba0.15Sr0.65Ca0.2Ti2.8Nb1.2Si8O23.8[OH]4.2[H2O]4.55
  • Alphabetic Formula: Ba0.15Ca0.2[H2O]4.55K0.4Na0.2Nb1.2O23.8[OH]4.2Si8Sr0.65Ti2.8
  • Published Formula: [Sr0.9K0.8Na0.4Ca0.4Ba0.3][Sr0.4(H2O)0.8][Ti5.6Nb2.4(OH,O)8(Si4O12)4]·8.3H2O
  • Refined Formula: Ba0.15Ca0.20H8.02K0.42Na0.20Nb1.20O32.01Si8Sr0.64Ti2.80
  • Wyckoff Sequence: 8,b27a10
  • Z Formula Units: 2
  • Density: ρ = 2.55 Mg·m−3

Crystallographic Data

Cell Parameters

Published Data
Standardized Data
Unit Cell
Niggli-Reduced Cell
Space Group
a
b
c
α
β
γ
a/b
b/c
c/a
V

Atom Coordinates

Standardized

Site
Element
Wyckoff Symbol
Symmetry
X
Y
Z
Occupation
Co-ord. No.
Atomic Env.

Published

Site
Element
Wyckoff Symbol
Symmetry
X
Y
Z
Occupation

Displacement Parameters

Isotropic

Site
Published
U [nm2]
Type
Computed
Beq [nm2]

Experimental Details

Reference

3D Interactive Structure

About this content

  • Database name

    PAULING FILE Multinaries Edition – 2012

  • Dataset ID

    sd_1213982

  • Copyright

    ©Springer & Material Phases Data System (MPDS), Switzerland & National Institute for Materials Science (NIMS), Japan, 2016

  • Chief Editor

    Pierre Villars, Material Phases Data System (MPDS), CH-6354 Vitznau, Switzerland

    villars.mpds@bluewin.ch

  • Credits

    SpringerMaterials Release 2016.

    Data generated pre-2002: © Springer & MPDS & NIMS; post-2001: © Springer & MPDS

    All Rights Reserved. Version 2016.10.

    Project Coordinator: Shuichi Iwata

    Section-Editor: Karin Cenzual (Crystal Structures)

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